}

    /**
     * Sets whether to extract top-level fields as metadata.
     *
     * @param extractMetadata true to extract metadata
     */
    public void setExtractMetadata(final boolean extractMetadata) {
        this.extractMetadata = extractMetadata;
    }

    /**
     * Sets the separator for nested keys.
     *
     * @param nestedKeySeparator the nested key separator

                throw exceptionSet.iterator().next();
            }
            writer.flush();
            final ExtractData extractData = new ExtractData(writer.toString());
            extractMetadata(document, extractData);
            return extractData;
        } catch (final Exception e) {
            throw new ExtractException(e);
        }
    }

    /**

	<component name="jsonExtractor"
		class="org.codelibs.fess.crawler.extractor.impl.JsonExtractor">
		<property name="maxDepth">10</property>
		<property name="extractMetadata">true</property>
	</component>
	<component name="csvExtractor"
		class="org.codelibs.fess.crawler.extractor.impl.CsvExtractor">
		<property name="hasHeader">true</property>